Re: Hyperbolic function identity
- To: mathgroup at smc.vnet.net
- Subject: [mg50962] Re: Hyperbolic function identity
- From: Paul Abbott <paul at physics.uwa.edu.au>
- Date: Wed, 29 Sep 2004 07:09:26 -0400 (EDT)
- Organization: The University of Western Australia
- References: <cjasqk$ns0$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <cjasqk$ns0$1 at smc.vnet.net>, carlos at colorado.edu (Carlos Felippa) wrote: > Why > > FullSimplify[ArcCosh[1+z^2/2]-2*ArcSinh[z/2],z>0]; > > does not evaluate to 0? Good question. Note that FullSimplify[TrigToExp[ArcCosh[z^2/2 + 1] - 2 ArcSinh[z/2]], z > 0] does evaluate to 0. Cheers, Paul -- Paul Abbott Phone: +61 8 6488 2734 School of Physics, M013 Fax: +61 8 6488 1014 The University of Western Australia (CRICOS Provider No 00126G) 35 Stirling Highway Crawley WA 6009 mailto:paul at physics.uwa.edu.au AUSTRALIA http://physics.uwa.edu.au/~paul